just put a new clutch ,pressure plate in my sons 1998 audi a4 quattro. very difficult job for a backyarder,but not imposible. got the job done,clutch works fine.The problem is ,i removed the front part of the rear driveshaft to remove the tranny and re installed it,and now have a vibration in the steady bearing. I made sure to mark the position of the drive shaft before i took it apart. idon,t understand what could be causing the vibration. This old backyarder needs help,anybody got any suggestions,would greatly be appreciated,thanks

 

Might not be the driveshaft - check the torque on the halfshaft-to-diff bolts (the 8mm triple-square bolts). They have a tendency to loosen.